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Finding the Fourth Proportional to 451,015.34, 621,902.39 and 287,412.67

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Solution

The fourth proportional to 451,015.34, 621,902.39 and 287,412.67 is: 396,311.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,015.34 : 621,902.39 = 287,412.67 : x
  2. Step 2: Convert to fraction form
    451,015.34/621,902.39 = 287,412.67/x
  3. Step 3: Cross multiply
    451,015.34x = 621,902.39 × 287,412.67
  4. Step 4: Simplify right side
    451,015.34x = 178,742,627,225.51
  5. Step 5: Solve for x
    x = 178,742,627,225.51/451,015.34
  6. Step 6: Final answer
    x = 396,311.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.